package com.chinasoft.hello;

public class mymath {
    public static int add(int a,int b){
        //这里的bug被删掉了
        //别吵
        return a+b;

    }
    public static  int sub(int a,int b){
        return a-b;
    }

    public static int mul(int a,int b){
        return a*b;
    }
}
